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Power supply is 420-0-420 Heyboer @ 800mA. Choke is Hammond 5H at 25 ohms. Main capacitor is 400uF Wima. B+ voltage is 350V. Rectifier diodes are 816s.
The amplifier chassis is a Tubelab Simple SE with 6l6GC in UL. Cathode resistor is 220 ohms giving me 93mA per tube.
The 12AT7 had way too much gain. I swapped to a 12BH7 and changed the cathode resistor to 560 ohm. I removed the cathode bypass caps for the driver. I've got 160V at 10mA for the 12BH7 using the 10m45 CCS.
I also fed the 10m45 from the UL taps - but don't think I'm getting much local feedback. (if any)
Output transformers are Edcor GXSE15-2.5K to 8 ohm. Coupling caps are .1uF Wima film and foil.
The amp sounds great. I need to get some measurements.
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Topic - amp build - rage 05:04:22 11/16/21 (25)
- RE: amp build - PakProtector 04:30:02 11/17/21 (0)
- RE: amp build - Tre' 12:13:35 11/16/21 (21)
- RE: amp build - rage 13:54:52 11/16/21 (19)
- RE: amp build - Triode_Kingdom 23:46:17 11/16/21 (13)
- RE: amp build - rage 05:15:28 11/17/21 (10)
- Where is IMD? - Triode_Kingdom 10:45:11 11/17/21 (9)
- RE: Where is IMD? - rage 12:21:07 11/17/21 (8)
- RE: Where is IMD? - Triode_Kingdom 08:44:20 11/18/21 (7)
- RE: Where is IMD? - rage 17:16:06 11/18/21 (6)
- RE: Where is IMD? - deathtube 667 06:28:17 11/19/21 (5)
- RE: Where is IMD? - rage 05:34:30 11/20/21 (4)
- RE: Where is IMD? - tube wrangler 14:00:52 11/20/21 (3)
- RE: Where is IMD? - Triode_Kingdom 15:52:15 11/20/21 (2)
- RE: Where is IMD? - tube wrangler 02:00:25 11/21/21 (1)
- RE: Where is IMD? - deafbykhorns 18:00:47 11/21/21 (0)
- RE: amp build - rage 03:38:57 11/17/21 (1)
- RE: amp build - deathtube 667 04:43:20 11/17/21 (0)
- RE: amp build - Tre' 18:43:23 11/16/21 (3)
- RE: amp build - rage 03:37:56 11/17/21 (2)
- RE: amp build - Stuben 12:22:11 11/17/21 (1)
- RE: amp build - rage 04:54:02 11/18/21 (0)
- RE: amp build - rage 13:55:45 11/16/21 (0)
- RE: amp build - rage 12:40:15 11/16/21 (0)
- RE: amp build - rage 05:05:30 11/16/21 (1)
- Nice! - Triode_Kingdom 06:48:16 11/16/21 (0)